Refrigerator



FIG. 1 is a front, right side, perspective view of a refrigerator showing our new design shown in a closed condition;

FIG. 2 is a front view thereof;

FIG. 3 is a perspective view, shown in an open condition; and,

FIG. 4 is a perspective view thereof, shown in another open condition.

The broken lines shown in the drawings illustrate unclaimed portions of the refrigerator and form no part of the claimed design. 

CLAIM The ornamental design for a refrigerator, as shown and described. 